{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Disease", "Chemical"], "input": "Sedation depth during spinal anesthesia and the development of postoperative delirium in elderly patients undergoing hip fracture repair ."}
{"Disease": ["postoperative delirium", "hip fracture"], "Chemical": []}